Spike-pulling jack.



H. E. WADSWORTH.

SPIKE PULLING JACK.

APPLIGATION FILED DE0.11.I 1912.

1,078,1 78. Patented Nov. 11, 1913.

b u 2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c

' rr D STATE PATENT ()1'113116 HARRY EZRA WADSWORTH, OF VANCOUVER, WASHINGTON.

SPIKELPULLING JACK.

Specification of Letters Patent.

Patented Nov. 11,1913.

Application filed December 11, 1912. Serial No. 736,213.

To allwhomz'tmay concerm Be it known thatI, HARRY E. YWADS- WORTH, a citizen of the United States, residing at Vancouver, in the countyofGlarke and State of Washington, have invented and discovered a new and useful Machine Desige the nated as a Spike-Pulling Jack, of which following is a specification.

My invention relates to certain new and useful improvements in jacks adapted .to pull spikes, bolts and the like, and particularly spikes and drift bolts from railway ties and bridge timbers.

The object of my invention is to provide A further object is to provide a jackin.

which the greatest power is exerted tostart the spike or bolt and after it is started .the leverage is decreased and the speed of movement of the bolt or spike correspondingly increased.

With these and other objects in view my invention consists in certain constructions, combinations and arrangements of parts, the preferred form of which'will be first described in connection with the accompanying drawings and then the invention particularly pointed out in the appended claims.

Referring to the drawings wherein the same part is designated by the same reference numeral wherever it occurs, Figure 1 is a side elevation of the preferred form of my invention showing the parts in full lines in the position they assume as they engage a railway spike, and in dotted lines at the limit of their withdrawing movement. Fig. 2 is a view similar to Fig. 1, with the parts however shown in a position intermediate the two positions shown in Fig. 1, and with the bolt-engaging dog illustrated in Fig. 1 omitted; Fig. 3 is a front elevation of the claw detached; Fig. 4 is a section taken on line 4-4 of Fig. 3; Fig. 5 is a top plan view of the construction shown in Fig. 3; Fig. 6 is a side elevation of the lower portion of my device when used for withdrawing long bolts, and Fig. 7 is a perspective view of the bolt engaging dog detached.

10 designates a standard formed at its base with a foot 11 on which it stands, the foot belng .preferablylprovided with a spur 12 to prevent the device from slipping. In the upper end of the standard 10 is pivoted a lever 14 upon the pivot 15, carried by the standard. 5 v

16 designates a sleeve .fitted to slide on the standard 10 and cut away on its rear side as shown at 35, soas to straddle the foot 11. This sleeve carries on its front portion a pairof ears 36 between which is. pivoted one endof a link 17 by the pivot 18. -The pin 19 carried by the lever 14 passes.

through an elongated slot 20 in the other end of the link. Pivoted to the link 17 by a pivot 22 is a second link 21, said link at its upper end being provided with a slot 24 through whlch passes the pin 23 on the sleeve 14. The lengths of the links 17 and 21 and of the slots 20 and 24 therein are so proportioned thatwhen the sleeve 15 is in its lowermost position, as shown in Fig. 1,

the pin 19 will be at the top ofthe slot 20,

and the pin 23 will be at the bot-tom of the slot 24. Since the pin 23 is farther away from the pin 15 of the lever 14 than is the pin 19 when the lever is forced down in drawing a spike or the like, it will first pull through the link 17 and consequently the maximum leverage will be utilized. When however the spike has been started and will consequently withdraw more easily, and the parts have assumed the position shown in Fig. 2, then the pin 23 will reach the upper end of the slot 24 and the remaining portion of the pull will be given through the link 21. Consequently in the latter portion of the movement the spike will be moved faster.

The spike engaging means carried by the sleeve 16 comprises aclaw 26 of any ordinary or desired type, preferably that shown in the drawings, whereby the claw can readily engage beneath the head of the spike or bolt to be drawn.

When it is desired to draw bolts or the like which are of such a length that a single movement of the lever 14 will not be sufiicient to pull them the entire distance out, or when such bolts or rods are unprovided with the claw 26 I preferably pivot a U- shaped yoke 29 on the pivot 18 in the ears 36, this yoke being shown in detail in Fig. 1, and in operative position in Figs. 1 and 6. This yoke at the base of the U is provided with an edge that is adapted to cut into the bolt being drawn to firmly engage the same. When long bolts are to be withdrawn it is also preferable to remove the link 21 anduse the device as shown in Fig 6.

I am aware that considerablevariation is f possible in the details of construction here in shown and described, without departing from the spirit of my invention, and I do not intend to limit myself thereto, except aspointed out-in the following claims J11 which it is my intention to claim all the novelty inherent in the structure shown and described as broadly as the state of the art will permit I V Having thus described my invention what I claim as'new and desire to secure by Letters- Patent is one link and the other through the slot in the other link, and means for connecting the opposite ends of the links to the sleeve.

2. In a device for extracting spikes,'bolts or the like the combination with a standard, of a sleeve provided with a claw slidably mounted upon the standard, a, lever pivoted to the standard, said lever being provided with a pair of pins arranged at diflerent distances from the pivot of the lever, a pair of links provided With slots in one end, one of said pins extending through the slot in one link and the other through the slot in the other link, the opposite end of one of said links being pivoted to the other link and the opposite end of the last-mentioned link being connected to the sleeve.

3. In a device for extracting spikes, bolts or the like the combination with a claw slidably mounted, a pair of ears carried by the claw, a link pivoted to the ears at one end, operating means to which the other end of the link is connected, and a U-shaped dog pivoted to the ears by the pivot pin of the link, said-dog being adapted to cooperate with the claw and engage a bolt or the like to be drawn.

In testimony whereof I afiix my signature in the presence of two Witnesses.

HARRY EZRA VVADSVVORTH.

Witnesses:

EUnIon DURBIN, W. E. YATES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, I). 0. 

